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Parlay/OSA网关中SIP协议映射子系统的设计与实现
The Design and Implementation of SIP Mapping Subsystem in Parlay/OSA Gateway
【作者】 庄宇;
【导师】 廖建新;
【作者基本信息】 北京邮电大学 , 计算机应用技术, 2006, 硕士
【摘要】 随着数据业务的不断发展,下一代网络成为发展的必然趋势。下一代网络采用分层的结构,分为松散耦合的:业务层、控制层、媒体传输层和接入层。在下一代网络中,Parlay/OSA(Open Service Access)网关属于业务层实体,它为各种增值业务和智能业务的执行和管理提供环境,也对第三方业务提供商提供开放的业务接口。Parlay/OSA网关屏蔽底层网络复杂的协议和底层网络的异构性,向应用服务器和第三方应用提供了开放的标准的Parlay/OSA API,从而实现了对底层网络的控制。同时,在下一代网络的发展中,SIP(Session Initiation Protocol)协议成为下一代网络的重要控制协议。因此,将二者统一起来,实现SIP协议与Parlay/OSA API的映射变的非常重要。 Parlay/OSA(Open Service Access)网关由框架子系统、业务能力服务器子系统、协议子系统、网管子系统和操作维护子系统组成的。业务能力服务器子系统向外提供标准的Parlay/OSA API,在3GPP29.198-4中定义了MPCC SCF(Multi-party call control Service Capability Feature),规定了多方呼叫控制Parlay/OSA API接口的框架结构。同时,在3GPP 29.998-04中规定了SIP协议与Parlay/OSA API之间的映射。协议映射子系统完成底层网络设备协议的适配功能。 本人在课题期间负责设计与实现Parlay/OSA网关中的SIP协议映射子系统,包括SIP Server模块与MPCC SCF模块;完成了SIP协议与Parlay/OSA API的映射,对3GPP 29.998-04规定的SIP协议与Parlay/OSA API之间的映射进行了系统的总结与归纳,包括SIP协议中各种概念的映射、SIP协议中呼叫控制映射和SIP协议中消息参数映射,并对映射进行了针对性的扩展。在SIP协议映射子系统中,SIP Server模块负责实现与底层SIP协议栈的适配接口,完成SIP协议与中间内部接口的协议转换,为业务的实现提供特定的SIP服务模式;此模块在设计中采用了分层设计的思想分为3个子模块,SIP协议栈模块、SIP协议栈适配模块和CORBA(Common Obiect Request Broker Architecture)通信模块,同时考虑到采用了面向对象的设计方法,抽
【Abstract】 With the development of data service, The NGN(Next Generation Network) becomes the direction. The NGN adapts the layered structure as service layer, control layer, media transport layer and access layer. In NGN network, Parlay/OSA(Open Service Access) Gateway is a function entity in service layer which enables application developers to make use of network functionality through an open standardised interface. Parlay/OSA Gateway hides complexity and difference of lower level network, provides APIs for application server and 3 rd service to control lower level network elements. Meanwhile, SIP(Session Initiation Protocol) becomes important call control protocol in NGN. So taking them together and implementation SIP Mapping Subsystem are great significative.Parlay/OSA Gateway composes of framework subsystem, service capability subsystem, potocol subsystem, network management subsystem and OAM subsystem. Service capability subsystem provides standardised Parlay/OSA APIs. 3GPP 29.198-4 defined architecture of MPCC SCF(Multi-party call control Service Capability Feature). And 3GPP 29.998-04 investigates how Parlay/OSA API can be mapped onto SIP methods. Potocol subsystem implements the adapter layer of lower level network.During researching I was in charge of designing and implementing the SIP Mapping Subsystem which takes the mapping between SIP and Parlay/OSA API including SIP conception mapping, SIP call control mapping and SIP message parameter mapping. The subsystem is compose of SIP Server and MPCC SCF. SIP Server supplies the adapter layer of
【Key words】 Next Generation Network; SIP; Parlay/OSA API; Protocol Mapping; SIP Server; MPCC SCF;
- 【网络出版投稿人】 北京邮电大学 【网络出版年期】2006年 11期
- 【分类号】TN915.05
- 【被引频次】1
- 【下载频次】123